Mill·ing n. The act or employment of grinding or passing through a mill; the process of fulling; the process of making a raised or intented edge upon coin, etc.; the process of dressing surfaces of various shapes with rotary cutters. See Mill.
 High milling, milling in which grain is reduced to flour by a succession of crackings, or of slight and partial crushings, alternately with sifting and sorting the product.
 Low milling, milling in which the reduction is effected in a single crushing or grinding.
 Milling cutter, a fluted, sharp-edged rotary cutter for dressing surfaces, as of metal, of various shapes.
 Milling machine, a machine tool for dressing surfaces by rotary cutters.
 Milling tool, a roller with indented edge or surface, for producing like indentations in metal by rolling pressure, as in turning; a knurling tool; a milling cutter.
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 milling machine
      n : machine tool in which metal that is secured to a carriage is
          fed against rotating cutters that shape it [syn: miller]